Hot-water heater



Mar. 27, 1923. 1,449, 7 F. w. JUDERJAHN I HOT WATER HEATER.

FILED SEPT.30, 1922.

Frank. W- Jufiarjahn Patented M ar 2 7, I a v uuirso s r-ares T allwhom Moray concern:

Be it known'that I, FRAN WV. JUDER- JAHN, a citizen'of the United States, and resident of Milwaukee, inthe county of 5 Milwaukee and State of Wisconsin, have in-.

vented certain new .and useful Improvements in Hot-lVater Heaters; and-I doherev y:declare that the following is a full, clear, and exact description thereof. i

This invention relates to hot Water heaters,'- and is particularly'directed to a heater adapted to use illuminating gas.

In the use of hot water heaters, which employ ordinary illuminating gas for the fuel, two general practices have been followed, namely :that of connecting the discharge vent for the products of combustion directly with a flue, or chimney, and that of allowing the products of combustion to discharge directly into the room in which the heater is mounted. Both of these practices have been found objectionable, for, on the one hand, when the heater is directly connected with the flue, a too rapid circulation of air is produced thru the heater, and a large percent of the heat passes up the chimney; and on the other hand, when the products of combustion are discharged directly into the room, staining of the walls results and objectionable odors are produced. This last mentioned effect is due, primarily, to an incomplete combustion caused by an inadequate circulation of air thru the combustion chamber'of the heater.

It is to overcome these defects that the present invention is designed, and such invention, therefore, has for its objects, the

provision of a heater in which maximum transfer of heat is effected, in which too rapid circulation of air thru the combustion chamber is prevented, and in which the discharge of objectionable fumes into the room and the staining of the walls is avoided.

An embodiment of the invention is shown in the accompanying drawings, in which. the single figure is an elevation of a heater partly in section.

The heater may comprise a combustion chamber 1 which is usually provided with a hinged door, not shown, and which is provided with a burner'2 positioned in the lower end of the combustion chamber, or casing. The heating coil 3 usually comprises a copper tube in the form of a helix, 5 and equipped with inlet and outlet fittings j Application filed September 30,1922. Serial No. 59 m? 7 I HOT-WATER HEATER.

i 4: and 5. .The upper portion fof thecombustion chamberfis contracted, ,ais in dioated at 6, and isprovided with an upturned flange flange; 7, and provides a .stack 'of relatively llmited extent for the heater. The upper brackets 11; It willbe seen, from'thefinvention thus far described, that the n ece ssary draft, or suction, for insuring an adequate circulation of air for complete combustion is provided by the pipe 9, and that'the flow of heated products of combustion thru the heater is controlled by means of the conical cap 10. I i

t has been found that choking may occur between the cap 10 and the pipe 9, and that such choking may be entirely prevented by the provision of a series of apertures 12 in the upper end'of the pipe 9.

t is also apparent that extreme difliculty would be encountered in effectively positioning the conical cap 10 with reference to the pipe 9, to secure the exact rate. of flow of the products of combustion which corresponds to the ideal combustion. However, the desired rate of flow may be accurately secured by'providing apertures 12 in the upper end of the pipe 9, their number and size being so chosen that the exact area of outlet for the pipe 9 is secured.

It will further be seen that-choking, or banking of the discharged products of combustion beneath .the eves, or edges, of the conical cap cannot occur, for the discharged products of combustion are blown sidewise from beneath the conical cap by the outwardly flowing streams from the openings 12.

It will further be seen that the downwardly directed products of combustion from the cone, or baffle member, 10 are directed outwardly by the outwardly passing streams from the pipe 12, so that intimate mixing of the outside air with the products of combustion is secured, and such products of combustion are therefore cooled by the entrained air. This prevents the formation of objectionable odors, and also prevents the products of combustion from striking the walls of the room in an unbroken, or unmixed, stream. It has been found that com- 1,449,678 mum FRANK w. JUDEBJ'AHN, or MILWAUKEE, wrsoolvsmfnssreuoa oF oNE-HALFTo J Jorrn LUBENQW, or MILwAUxnnwIsooNs-IN.

.7 and a central upper outlet 8. Arelatively short length of pipe vv9 is fitted around the plete combustion is secured by this invention, warm the walls of the rooIn,.' in which the heater is positioned, are not stained.

1 From-actual exper men si qndm e i a heater constructed-in accordance with this invention, it has been found that the time required for heating a given volume of. mater to a given temperature is approximately only two-thirds as 'giat as that required for heating the same voulme ofwater to the same temperature when the theater was connected directly with the fiue'for chimney.

is, therefore appareint thatthe efli'ciency q 'hq Wa h e s h b e Y y r y increased by this invention, and'that a more perfect combustion of 'gas is secured claim; V7 p V A'hot'water heater havingan open botand'i r'ovided with a burner there i'n'and having a top provided with a discharge- 'opening a pipefs'eoured 'to -said heater and forming a continuation of said discharge opening, a conical cap mounted above said pipe in spaced relation thereto and 'eiztending outwardly and overhanging the upper edge of said pipe and providing, with vsaid pipe a constrictdjpas's'age way 'oiitwa'r y and downwardly for the products of combustionto thereby retard the flow of the products of combustion, said pipe having a plurality of horizontal rows of apertures immediately adjacent said conical cap, the upper ofsaid rows aligningv with the bottom edge of said cap, said apertures adapted to penrnit the products of combustion. to pass radially outwardly and to'iningle withthe downwardly and 1 outwardly flowing prodnets of combustion from-beneath the cap.

In testimony that-I claim the foregoing I have hereuntoset hand at Milwaukee,

in the county of Milwaukee and State of Wisconsin. v

' v FRANK W. J UDERJ AHN. 

